/* ============================================================
   广州拓算智云科技有限公司 — 官网样式表
   设计基调：深空底 + 青蓝紫渐变 + 玻璃拟态卡片
   ============================================================ */

:root {
  --bg: #05070f;
  --bg-soft: #090d1a;
  --bg-elev: #0d1224;

  --surface: rgba(255, 255, 255, 0.038);
  --surface-hi: rgba(255, 255, 255, 0.07);
  --line: rgba(255, 255, 255, 0.09);
  --line-hi: rgba(255, 255, 255, 0.16);

  --text: #eaf0ff;
  --text-2: #b9c4de;
  --muted: #7f8db0;

  --cyan: #22d3ee;
  --blue: #4f8cff;
  --violet: #8b5cf6;
  --green: #34d399;

  --grad: linear-gradient(120deg, #22d3ee 0%, #4f8cff 48%, #8b5cf6 100%);
  --grad-soft: linear-gradient(120deg, rgba(34, 211, 238, 0.16), rgba(139, 92, 246, 0.16));

  --radius: 16px;
  --radius-lg: 22px;
  --maxw: 1240px;

  --nav-h: 74px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", -apple-system,
    BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* ============================================================
   明亮主题：跟随系统或用户手动切换（data-theme="light"）
   ============================================================ */
[data-theme="light"] {
  --bg: #eef2fb;
  --bg-soft: #e6ecf7;
  --bg-elev: #ffffff;

  --surface: rgba(15, 23, 42, 0.035);
  --surface-hi: rgba(15, 23, 42, 0.065);
  --line: rgba(15, 23, 42, 0.1);
  --line-hi: rgba(15, 23, 42, 0.18);

  --text: #0f1830;
  --text-2: #3b4a66;
  --muted: #6b7894;

  --cyan: #0891b2;
  --blue: #1d4ed8;
  --violet: #4f46e5;
  --green: #059669;

  --grad: linear-gradient(120deg, #0ea5e9 0%, #2563eb 55%, #1d4ed8 100%);
  --grad-soft: linear-gradient(120deg, rgba(37, 99, 235, 0.1), rgba(29, 78, 216, 0.1));
}

/* 氛围光：亮色下用更柔和的浅蓝光 */
[data-theme="light"] body::before {
  background:
    radial-gradient(720px 480px at 12% -6%, rgba(37, 99, 235, 0.12), transparent 62%),
    radial-gradient(680px 460px at 92% 4%, rgba(124, 58, 237, 0.1), transparent 60%),
    radial-gradient(900px 620px at 50% 108%, rgba(8, 145, 178, 0.08), transparent 66%);
}

[data-theme="light"] ::selection {
  background: rgba(37, 99, 235, 0.2);
  color: #0f1830;
}

/* 滚动条 */
[data-theme="light"] ::-webkit-scrollbar-track {
  background: #e3e9f4;
}
[data-theme="light"] ::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #aab6d4, #c4cde2);
  border-color: #e3e9f4;
}
[data-theme="light"] ::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #91a0c6, #aab6d4);
}

/* 吸顶导航底色 */
[data-theme="light"] .nav.is-stuck {
  background: rgba(255, 255, 255, 0.82);
}

/* Hero 浮动技术卡 */
[data-theme="light"] .tech-card {
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 18px 44px -20px rgba(15, 23, 42, 0.28);
}

/* 表单输入 */
[data-theme="light"] .field input,
[data-theme="light"] .field select,
[data-theme="light"] .field textarea {
  background: rgba(15, 23, 42, 0.035);
}
[data-theme="light"] .field input:focus,
[data-theme="light"] .field select:focus,
[data-theme="light"] .field textarea:focus {
  background: rgba(15, 23, 42, 0.055);
}
[data-theme="light"] .field select option {
  background: #ffffff;
  color: #0f1830;
}

/* 成功提示文字（亮色下用深绿） */
[data-theme="light"] .form-ok {
  color: #047857;
}

/* 移动端展开菜单底色 */
[data-theme="light"] .nav__menu.is-open {
  background: rgba(255, 255, 255, 0.98);
  border-color: rgba(15, 23, 42, 0.12);
  box-shadow: 0 30px 60px -24px rgba(15, 23, 42, 0.3);
}

/* ---------------- Reset ---------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 12px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 全局氛围光 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(720px 480px at 12% -6%, rgba(79, 140, 255, 0.16), transparent 62%),
    radial-gradient(680px 460px at 92% 4%, rgba(139, 92, 246, 0.14), transparent 60%),
    radial-gradient(900px 620px at 50% 108%, rgba(34, 211, 238, 0.09), transparent 66%);
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  line-height: 1.28;
  font-weight: 700;
  letter-spacing: -0.01em;
}

p {
  margin: 0;
}

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}

::selection {
  background: rgba(79, 140, 255, 0.34);
  color: #fff;
}

/* 滚动条 */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: #070a14;
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #2f3a5e, #232c48);
  border-radius: 8px;
  border: 2px solid #070a14;
}
::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #3f5fa8, #2d3a63);
}

/* ---------------- 布局工具 ---------------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
  position: relative;
  z-index: 1;
}

.section {
  padding: 104px 0;
  position: relative;
  z-index: 1;
}

.section--tight {
  padding: 72px 0;
}

.section--alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.018), rgba(255, 255, 255, 0));
  border-block: 1px solid var(--line);
}

.grid {
  display: grid;
  gap: 22px;
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}
.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}
.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* ---------------- 文字组件 ---------------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 12.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
  font-weight: 600;
  margin-bottom: 16px;
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), transparent);
}

.sec-head {
  max-width: 760px;
  margin: 0 auto 56px;
  text-align: center;
}

.sec-head .eyebrow {
  justify-content: center;
}

.sec-title {
  font-size: clamp(28px, 3.4vw, 42px);
  margin-bottom: 16px;
}

.sec-title .hl {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.sec-desc {
  color: var(--text-2);
  font-size: 16.5px;
}

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------------- 按钮 ---------------- */
.btn {
  --pad: 13px 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: var(--pad);
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease),
    background 0.28s var(--ease), border-color 0.28s var(--ease);
  white-space: nowrap;
}

.btn--primary {
  background: var(--grad);
  color: #04101f;
  box-shadow: 0 10px 30px -10px rgba(79, 140, 255, 0.75);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px -12px rgba(79, 140, 255, 0.9);
}

.btn--ghost {
  background: var(--surface);
  border-color: var(--line-hi);
  color: var(--text);
  backdrop-filter: blur(8px);
}

.btn--ghost:hover {
  background: var(--surface-hi);
  border-color: rgba(34, 211, 238, 0.5);
  transform: translateY(-2px);
}

.btn--sm {
  --pad: 9px 20px;
  font-size: 14px;
}

.btn .arrow {
  transition: transform 0.28s var(--ease);
}

.btn:hover .arrow {
  transform: translateX(4px);
}

/* ---------------- 导航栏 ---------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 100;
  display: flex;
  align-items: center;
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease),
    backdrop-filter 0.3s var(--ease);
  border-bottom: 1px solid transparent;
}

.nav.is-stuck {
  background: rgba(6, 9, 18, 0.82);
  backdrop-filter: blur(18px) saturate(140%);
  border-bottom-color: var(--line);
}

.nav__inner {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  flex-shrink: 0;
}

.brand__logo {
  width: 42px;
  height: 42px;
  object-fit: contain;
  flex-shrink: 0;
}

.brand__text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  line-height: 1.2;
}

.brand__name {
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.01em;
}

.brand__sub {
  display: none;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav__link {
  position: relative;
  padding: 9px 15px;
  font-size: 15px;
  color: var(--text-2);
  border-radius: 9px;
  transition: color 0.22s var(--ease), background 0.22s var(--ease);
}

.nav__link:hover {
  color: var(--text);
  background: var(--surface);
}

.nav__link.is-active {
  color: var(--text);
}

.nav__link.is-active::after {
  content: "";
  position: absolute;
  left: 15px;
  right: 15px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav__burger {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 11px;
  background: var(--surface);
  border: 1px solid var(--line);
  cursor: pointer;
  position: relative;
}

.nav__burger span {
  position: absolute;
  left: 11px;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transition: transform 0.3s var(--ease), opacity 0.2s var(--ease);
}

.nav__burger span:nth-child(1) {
  top: 14px;
}
.nav__burger span:nth-child(2) {
  top: 20px;
}
.nav__burger span:nth-child(3) {
  top: 26px;
}

.nav__burger.is-open span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.nav__burger.is-open span:nth-child(2) {
  opacity: 0;
}
.nav__burger.is-open span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* 主题切换按钮 */
.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--text);
  cursor: pointer;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  padding: 0;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease),
    transform 0.25s var(--ease);
}
.theme-toggle:hover {
  background: var(--surface-hi);
  border-color: var(--line-hi);
  transform: translateY(-2px);
}
.theme-toggle svg {
  width: 19px;
  height: 19px;
}
.theme-toggle__sun {
  display: block;
}
.theme-toggle__moon {
  display: none;
}
[data-theme="light"] .theme-toggle__sun {
  display: none;
}
[data-theme="light"] .theme-toggle__moon {
  display: block;
}

/* ---------------- Hero ---------------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + 40px) 0 80px;
  overflow: hidden;
}

#particle-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.62;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 56px;
  align-items: center;
}

.hero__pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 16px 7px 10px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--line-hi);
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 26px;
  backdrop-filter: blur(10px);
}

.hero__pill .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.16);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.16);
  }
  50% {
    box-shadow: 0 0 0 8px rgba(52, 211, 153, 0.04);
  }
}

.hero h1 {
  font-size: clamp(34px, 5vw, 60px);
  letter-spacing: -0.025em;
  margin-bottom: 22px;
}

.hero h1 .line2 {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__lead {
  color: var(--text-2);
  font-size: 17px;
  max-width: 580px;
  margin-bottom: 34px;
}

.hero__cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 42px;
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  max-width: 540px;
}

.hero__stat {
  padding: 16px 18px;
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.hero__stat b {
  display: block;
  font-size: 26px;
  font-weight: 750;
  line-height: 1.2;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__stat span {
  font-size: 13px;
  color: var(--muted);
}

/* Hero 右侧：浮动技术栈卡片 */
.hero__visual {
  position: relative;
  height: 460px;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(52px);
  opacity: 0.5;
}

.orb--1 {
  width: 300px;
  height: 300px;
  background: #2f7bff;
  top: 6%;
  left: 8%;
  animation: float1 11s ease-in-out infinite;
}

.orb--2 {
  width: 250px;
  height: 250px;
  background: #8b5cf6;
  bottom: 8%;
  right: 4%;
  animation: float2 13s ease-in-out infinite;
}

.orb--3 {
  width: 200px;
  height: 200px;
  background: #22d3ee;
  top: 42%;
  left: 44%;
  animation: float1 15s ease-in-out infinite reverse;
}

@keyframes float1 {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(28px, -24px) scale(1.08);
  }
}

@keyframes float2 {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(-26px, 22px) scale(1.1);
  }
}

.tech-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 14px 18px;
  border-radius: 15px;
  background: rgba(13, 18, 36, 0.82);
  border: 1px solid var(--line-hi);
  backdrop-filter: blur(16px);
  box-shadow: 0 18px 44px -20px rgba(0, 0, 0, 0.9);
  animation: floaty 7s ease-in-out infinite;
  white-space: nowrap;
}

.tech-card__ico {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 18px;
  flex-shrink: 0;
  background: var(--grad-soft);
  border: 1px solid var(--line-hi);
}

.tech-card b {
  display: block;
  font-size: 14.5px;
  font-weight: 650;
}

.tech-card span {
  font-size: 12px;
  color: var(--muted);
}

/* 用 nth-of-type 只数 div 卡片（hero__visual 里的 orb 是 span，nth-child 会错位导致卡片全部叠在一起） */
.tech-card:nth-of-type(1) {
  top: 4%;
  left: 2%;
  animation-delay: 0s;
}
.tech-card:nth-of-type(2) {
  top: 28%;
  right: 0;
  animation-delay: 0.9s;
}
.tech-card:nth-of-type(3) {
  top: 54%;
  left: 0;
  animation-delay: 1.8s;
}
.tech-card:nth-of-type(4) {
  bottom: 6%;
  right: 8%;
  animation-delay: 2.6s;
}

@keyframes floaty {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-13px);
  }
}

.hero__scroll {
  position: absolute;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--muted);
  text-transform: uppercase;
  z-index: 2;
}

.hero__scroll i {
  display: block;
  width: 1px;
  height: 42px;
  background: linear-gradient(180deg, var(--cyan), transparent);
  animation: scrolly 2s ease-in-out infinite;
}

@keyframes scrolly {
  0%,
  100% {
    opacity: 0.25;
    transform: scaleY(0.5);
    transform-origin: top;
  }
  50% {
    opacity: 1;
    transform: scaleY(1);
    transform-origin: top;
  }
}

/* ---------------- 通用卡片 ---------------- */
.card {
  position: relative;
  padding: 30px 26px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: transform 0.34s var(--ease), border-color 0.34s var(--ease),
    background 0.34s var(--ease), box-shadow 0.34s var(--ease);
}

.card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.34s var(--ease);
  background: radial-gradient(
    420px 220px at var(--mx, 50%) var(--my, 0%),
    rgba(79, 140, 255, 0.14),
    transparent 70%
  );
  pointer-events: none;
}

.card:hover {
  transform: translateY(-6px);
  border-color: var(--line-hi);
  background: var(--surface-hi);
  box-shadow: 0 26px 56px -28px rgba(0, 0, 0, 0.92);
}

.card:hover::after {
  opacity: 1;
}

.card__ico {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-size: 24px;
  margin-bottom: 18px;
  background: var(--grad-soft);
  border: 1px solid var(--line-hi);
}

.card h3 {
  font-size: 19px;
  margin-bottom: 10px;
}

.card p {
  color: var(--text-2);
  font-size: 14.8px;
  line-height: 1.78;
}

.card--link {
  display: block;
}

.card__more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--cyan);
}

.card__more .arrow {
  transition: transform 0.28s var(--ease);
}

.card--link:hover .card__more .arrow {
  transform: translateX(4px);
}

/* ---------------- 数据成绩 ---------------- */
.stats {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px;
}

.stat {
  text-align: center;
  padding: 28px 14px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.stat:hover {
  transform: translateY(-5px);
  border-color: rgba(79, 140, 255, 0.45);
}

.stat b {
  display: block;
  font-size: clamp(28px, 3vw, 38px);
  font-weight: 750;
  line-height: 1.14;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-variant-numeric: tabular-nums;
}

.stat span {
  font-size: 13.5px;
  color: var(--muted);
}

/* ---------------- 案例卡 ---------------- */
.case {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  transition: transform 0.34s var(--ease), border-color 0.34s var(--ease);
}

.case:hover {
  transform: translateY(-6px);
  border-color: rgba(139, 92, 246, 0.45);
}

.case__top {
  height: 148px;
  position: relative;
  display: grid;
  place-items: center;
  font-size: 42px;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.case__top::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.2), rgba(139, 92, 246, 0.22));
}

.case__top span {
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 6px 18px rgba(0, 0, 0, 0.5));
}

.case__body {
  padding: 24px 24px 26px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.case__tag {
  align-self: flex-start;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  color: var(--cyan);
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.28);
  margin-bottom: 14px;
}

.case__body h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

.case__body p {
  color: var(--text-2);
  font-size: 14.5px;
  flex: 1;
}

.case__metric {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.case__metric b {
  font-size: 24px;
  font-weight: 750;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.case__metric span {
  font-size: 13px;
  color: var(--muted);
}

/* ---------------- 案例详情块 ---------------- */
.case-detail {
  padding: 36px 34px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--line);
  margin-bottom: 26px;
  transition: border-color 0.34s var(--ease), background 0.34s var(--ease);
}

.case-detail:last-child {
  margin-bottom: 0;
}

.case-detail:hover {
  border-color: rgba(139, 92, 246, 0.4);
  background: var(--surface-hi);
}

.case-detail__head {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 24px;
}

.case-detail__ico {
  width: 62px;
  height: 62px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  font-size: 30px;
  flex-shrink: 0;
  background: linear-gradient(140deg, rgba(34, 211, 238, 0.16), rgba(139, 92, 246, 0.18));
  border: 1px solid var(--line-hi);
}

.case-detail__head h2 {
  font-size: clamp(20px, 2.4vw, 26px);
  margin-top: 6px;
}

.case-detail__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
  margin-bottom: 26px;
}

.case-detail__block h4 {
  font-size: 15px;
  margin-bottom: 10px;
  color: var(--cyan);
  display: flex;
  align-items: center;
  gap: 8px;
}

.case-detail__block h4::before {
  content: "";
  width: 3px;
  height: 14px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--violet));
}

.case-detail__block p {
  color: var(--text-2);
  font-size: 15px;
  line-height: 1.85;
}

.case-detail__kpis {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.case-detail__kpi {
  text-align: center;
  padding: 16px 10px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.028);
  border: 1px solid var(--line);
}

.case-detail__kpi b {
  display: block;
  font-size: 22px;
  font-weight: 750;
  line-height: 1.25;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.case-detail__kpi span {
  font-size: 12.5px;
  color: var(--muted);
}

/* ---------------- 资质 ---------------- */
.certs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.cert {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 22px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.cert:hover {
  transform: translateY(-4px);
  border-color: rgba(52, 211, 153, 0.42);
}

.cert__badge {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 20px;
  background: rgba(52, 211, 153, 0.12);
  border: 1px solid rgba(52, 211, 153, 0.3);
  flex-shrink: 0;
}

.cert b {
  display: block;
  font-size: 15px;
  font-weight: 650;
}

.cert span {
  font-size: 12.5px;
  color: var(--muted);
}

/* ---------------- 客户评价轮播 ---------------- */
.slider {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

.slide {
  display: none;
  padding: 40px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--line);
  animation: fadeIn 0.5s var(--ease);
}

.slide.is-active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.slide__quote {
  font-size: 16.5px;
  color: var(--text-2);
  line-height: 1.92;
  margin-bottom: 26px;
  position: relative;
  padding-left: 30px;
}

.slide__quote::before {
  content: "\201C";
  position: absolute;
  left: -4px;
  top: -18px;
  font-size: 62px;
  line-height: 1;
  color: rgba(79, 140, 255, 0.4);
  font-family: Georgia, serif;
}

.slide__by {
  display: flex;
  align-items: center;
  gap: 13px;
}

.slide__avatar {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 700;
  color: #04101f;
  background: var(--grad);
  flex-shrink: 0;
}

.slide__by b {
  display: block;
  font-size: 15px;
}

.slide__by span {
  font-size: 13px;
  color: var(--muted);
}

.slider__ctrl {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-top: 30px;
}

.slider__btn {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--line-hi);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: background 0.25s var(--ease), transform 0.25s var(--ease);
  font-size: 17px;
}

.slider__btn:hover {
  background: var(--surface-hi);
  transform: scale(1.06);
}

.slider__dots {
  display: flex;
  gap: 8px;
}

.slider__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  border: none;
  padding: 0;
  cursor: pointer;
  transition: all 0.28s var(--ease);
}

.slider__dot.is-active {
  width: 26px;
  border-radius: 999px;
  background: var(--grad);
}

/* ---------------- 服务流程 ---------------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.step {
  position: relative;
  padding: 26px 22px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.step:hover {
  transform: translateY(-5px);
  border-color: rgba(79, 140, 255, 0.45);
}

.step__no {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-weight: 750;
  font-size: 16px;
  color: #04101f;
  background: var(--grad);
  margin-bottom: 15px;
}

.step h4 {
  font-size: 16.5px;
  margin-bottom: 10px;
}

.step li {
  font-size: 13.5px;
  color: var(--text-2);
  padding-left: 15px;
  position: relative;
  line-height: 1.85;
}

.step li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--cyan);
}

/* ---------------- 愿景使命 ---------------- */
.vm {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.vm__item {
  position: relative;
  padding: 48px 40px;
  border-radius: var(--radius-lg);
  background: linear-gradient(140deg, rgba(79, 140, 255, 0.14), rgba(139, 92, 246, 0.09));
  border: 1px solid var(--line-hi);
  overflow: hidden;
  text-align: center;
}

.vm__item > * {
  position: relative;
}

.vm__label {
  display: inline-block;
  font-size: 20px;
  letter-spacing: 0.3em;
  color: var(--cyan);
  margin-bottom: 18px;
  font-weight: 700;
}

.vm__item h3 {
  font-size: clamp(22px, 2.6vw, 30px);
  margin-bottom: 12px;
}

.vm__item p {
  font-size: 13.5px;
  color: var(--text-2);
  letter-spacing: 0.03em;
}

/* ---------------- CTA 条 ---------------- */
.cta-bar {
  position: relative;
  padding: 62px 48px;
  border-radius: 26px;
  background: linear-gradient(120deg, rgba(34, 211, 238, 0.15), rgba(79, 140, 255, 0.18) 50%, rgba(139, 92, 246, 0.16));
  border: 1px solid var(--line-hi);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 34px;
  flex-wrap: wrap;
}

.cta-bar > * {
  position: relative;
}

.cta-bar h2 {
  font-size: clamp(24px, 3vw, 34px);
  margin-bottom: 10px;
}

.cta-bar p {
  color: var(--text-2);
  font-size: 16px;
}

/* ---------------- 页脚 ---------------- */
.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.022), transparent);
  padding: 68px 0 0;
  margin-top: 40px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.7fr 1fr 1fr 1.2fr;
  gap: 44px;
  padding-bottom: 48px;
}

.footer__about p {
  color: var(--muted);
  font-size: 14.5px;
  margin-top: 18px;
  max-width: 340px;
}

.footer__about .brand {
  width: min(100%, 360px);
  padding: 10px 14px;
  border-radius: 10px;
  background: #fff;
}

.footer__about .brand__logo {
  width: 100%;
  height: auto;
  max-height: 112px;
  object-fit: contain;
}

.footer__about .brand__text {
  display: none;
}

.footer h4 {
  font-size: 15px;
  margin-bottom: 20px;
}

.footer__links li {
  margin-bottom: 12px;
}

.footer__links a {
  color: var(--muted);
  font-size: 14.5px;
  transition: color 0.24s var(--ease), padding-left 0.24s var(--ease);
}

.footer__links a:hover {
  color: var(--cyan);
  padding-left: 4px;
}

.footer__contact li {
  display: flex;
  gap: 11px;
  align-items: flex-start;
  color: var(--muted);
  font-size: 14.5px;
  margin-bottom: 14px;
}

.footer__contact i {
  font-style: normal;
  color: var(--cyan);
  flex-shrink: 0;
}

.footer__bottom {
  border-top: 1px solid var(--line);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13.5px;
  color: var(--muted);
}

.footer__bottom a:hover {
  color: var(--cyan);
}

/* ---------------- 返回顶部 ---------------- */
.to-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--grad);
  color: #04101f;
  border: none;
  cursor: pointer;
  display: grid;
  place-items: center;
  font-size: 19px;
  font-weight: 700;
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: all 0.32s var(--ease);
  box-shadow: 0 12px 30px -10px rgba(79, 140, 255, 0.8);
}

.to-top.is-show {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.to-top:hover {
  transform: translateY(-3px);
}

/* ---------------- 内页通用 ---------------- */
.page-head {
  position: relative;
  padding: calc(var(--nav-h) + 76px) 0 76px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.page-head::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(720px 380px at 22% -10%, rgba(79, 140, 255, 0.2), transparent 64%),
    radial-gradient(600px 340px at 84% 8%, rgba(139, 92, 246, 0.16), transparent 62%);
}

.page-head__inner {
  position: relative;
  z-index: 1;
  max-width: 780px;
}

.page-head h1 {
  font-size: clamp(30px, 4.4vw, 50px);
  margin-bottom: 18px;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.page-head p {
  color: var(--text-2);
  font-size: 17px;
}

.crumbs {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13.5px;
  color: var(--muted);
  margin-bottom: 20px;
}

.crumbs a:hover {
  color: var(--cyan);
}

.crumbs .sep {
  opacity: 0.5;
}

/* 产品详情行 */
.prod-row {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: center;
  padding: 52px 0;
  border-bottom: 1px solid var(--line);
}

.prod-row:last-child {
  border-bottom: none;
}

.prod-row--flip .prod-row__visual {
  order: 2;
}

.prod-row__visual {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  overflow: hidden;
  display: grid;
  place-items: center;
  font-size: 74px;
  background: linear-gradient(140deg, rgba(34, 211, 238, 0.12), rgba(139, 92, 246, 0.14));
}

.prod-row__visual > * {
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 10px 26px rgba(0, 0, 0, 0.5));
}

.prod-row h2 {
  font-size: clamp(24px, 2.8vw, 32px);
  margin-bottom: 14px;
}

.prod-row__lead {
  color: var(--text-2);
  font-size: 16px;
  margin-bottom: 22px;
}

.feat-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 26px;
}

.feat-list li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: 14.5px;
  color: var(--text-2);
}

.feat-list li::before {
  content: "\2713";
  color: var(--green);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

/* 时间线 */
.timeline {
  position: relative;
  padding-left: 34px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--blue) 45%, var(--violet));
  opacity: 0.45;
}

.tl-item {
  position: relative;
  padding-bottom: 34px;
}

.tl-item:last-child {
  padding-bottom: 0;
}

.tl-item::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 7px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--blue);
}

.tl-item__year {
  font-size: 14px;
  font-weight: 700;
  color: var(--cyan);
  margin-bottom: 6px;
  letter-spacing: 0.04em;
}

.tl-item h4 {
  font-size: 17px;
  margin-bottom: 7px;
}

.tl-item p {
  color: var(--text-2);
  font-size: 14.5px;
}

/* 联系表单 */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field--full {
  grid-column: 1 / -1;
}

.field label {
  font-size: 14px;
  color: var(--text-2);
  font-weight: 600;
}

.field label i {
  color: #f87171;
  font-style: normal;
  margin-right: 3px;
}

.field input,
.field select,
.field textarea {
  padding: 13px 16px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  color: var(--text);
  font-size: 15px;
  transition: border-color 0.24s var(--ease), background 0.24s var(--ease);
  outline: none;
  font-family: var(--font);
}

.field textarea {
  resize: vertical;
  min-height: 128px;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: rgba(79, 140, 255, 0.65);
  background: rgba(255, 255, 255, 0.06);
}

.field input::placeholder,
.field textarea::placeholder {
  color: #5c688a;
}

.field select option {
  background: #0d1224;
}

.form-note {
  font-size: 13px;
  color: var(--muted);
  margin-top: 14px;
}

.form-ok {
  display: none;
  margin-top: 18px;
  padding: 14px 18px;
  border-radius: 12px;
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.34);
  color: #6ee7b7;
  font-size: 14.5px;
}

.form-ok.is-show {
  display: block;
}

.info-card {
  padding: 30px 26px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--line);
}

.info-card h3 {
  font-size: 19px;
  margin-bottom: 8px;
}

.info-card > p {
  color: var(--text-2);
  font-size: 14.5px;
  margin-bottom: 24px;
}

.info-list li {
  display: flex;
  gap: 14px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.info-list li:last-child {
  border-bottom: none;
}

.info-list__ico {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  font-size: 18px;
  background: var(--grad-soft);
  border: 1px solid var(--line-hi);
  flex-shrink: 0;
}

.info-list b {
  display: block;
  font-size: 14.5px;
  font-weight: 650;
  margin-bottom: 2px;
}

.info-list span {
  font-size: 14px;
  color: var(--muted);
}

/* ---------------- 滚动入场 ---------------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.72s var(--ease), transform 0.72s var(--ease);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

/* ---------------- 响应式 ---------------- */
@media (max-width: 1080px) {
  .stats {
    grid-template-columns: repeat(3, 1fr);
  }
  .steps,
  .certs {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 36px;
  }
  .hero__inner {
    grid-template-columns: 1fr;
    gap: 44px;
  }
  .hero__visual {
    height: 380px;
    order: -1;
  }
  .hero {
    min-height: auto;
    padding-top: calc(var(--nav-h) + 24px);
  }
  .hero__scroll {
    display: none;
  }
  .prod-row {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .prod-row--flip .prod-row__visual {
    order: 0;
  }
}

@media (max-width: 860px) {
  .nav__menu,
  .nav__actions .btn {
    display: none;
  }

  .nav__burger {
    display: block;
  }

  .nav__menu.is-open {
    display: flex;
    position: absolute;
    top: var(--nav-h);
    left: 14px;
    right: 14px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 14px;
    border-radius: 18px;
    background: rgba(9, 13, 26, 0.97);
    border: 1px solid var(--line-hi);
    backdrop-filter: blur(20px);
    box-shadow: 0 30px 60px -24px rgba(0, 0, 0, 0.95);
  }

  .nav__menu.is-open .nav__link {
    padding: 13px 16px;
    font-size: 16px;
  }

  .nav__menu.is-open .nav__link.is-active::after {
    display: none;
  }

  .wrap,
  .nav__inner {
    padding: 0 18px;
  }

  .section {
    padding: 72px 0;
  }

  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .vm,
  .grid-2,
  .form-grid,
  .feat-list {
    grid-template-columns: 1fr;
  }

  .steps,
  .certs {
    grid-template-columns: 1fr;
  }

  .hero__stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
  }

  .hero__stat {
    padding: 12px 12px;
  }

  .hero__stat b {
    font-size: 21px;
  }

  .hero__stat span {
    font-size: 11.5px;
  }

  .slide {
    padding: 26px 22px;
  }

  .slide__quote {
    font-size: 15px;
    padding-left: 24px;
  }

  .cta-bar {
    padding: 40px 26px;
    text-align: center;
    justify-content: center;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .page-head {
    padding: calc(var(--nav-h) + 48px) 0 52px;
  }

  .tech-card {
    padding: 11px 14px;
  }

  .tech-card__ico {
    width: 32px;
    height: 32px;
    font-size: 15px;
  }

  .tech-card b {
    font-size: 13px;
  }

  .tech-card span {
    font-size: 11px;
  }
}

@media (max-width: 520px) {
  .grid-3,
  .grid-4,
  .stats {
    grid-template-columns: 1fr;
  }

  .hero__stats {
    grid-template-columns: 1fr;
  }

  .brand__sub {
    display: none;
  }

  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}